Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī

ذِكْرُ الزَّجْرِ عَنْ أَنْ لَا يُقِيمَ الْمَرْءُ صُلْبَهُ فِي رُكُوعِهِ وَسُجُودِهِ

ibnhibban:1891 – al-Faḍl b. al-Ḥubāb > Musaddad b. Musarhad > Mulāzim b. ʿAmr > ʿAbdullāh b. Badr

[Machine] We arrived in the presence of the Messenger of Allah ﷺ and prayed with him. He noticed a man who did not straighten his back properly during the bowing and prostration. The Messenger of Allah ﷺ said, "There is no prayer for one who does not straighten his back."  

ابن حبّان:١٨٩١ – أَخْبَرَنَا الْفَضْلُ بْنُ الْحُبَابِ قَالَ حَدَّثَنَا مُسَدَّدُ بْنُ مُسَرْهَدٍ عَنْ مُلَازِمِ بْنِ عَمْرٍو عَنْ عَبْدِ اللَّهِ بْنِ بَدْرٍ عَنْ عَبْدِ الرَّحْمَنِ بْنِ عَلِيِّ بْنِ شَيْبَانَ الْحَنَفِيِّ عَنْ أَبِيهِ وَكَانَ أَحَدَ الْوَفْدِ السِّتَّةِ قَالَ

قَدِمْنَا عَلَى رَسُولِ اللَّهِ ﷺ فَصَلَّيْنَا مَعَهُ فَلَمَحَ بِمُؤَخَّرِ عَيْنَيْهِ رَجُلًا لَا يُقِرُّ صُلْبَهُ فِي الرُّكُوعِ وَالسُّجُودِ فَقَالَ «إِنَّهُ لَا صَلَاةَ لِمَنْ لَمْ يُقِمْ صُلْبَهُ»  

See similar narrations below:

Collected by Ibn Mājah, Suyūṭī
ibnmajah:871 – Abū Bakr b. Abū Shaybah > Mulāzim b. ʿAmr > ʿAbdullāh b. Badr > ʿAbd al-Raḥman b. ʿAlī b. Shaybān

“We set out until we came to the Messenger of Allah ﷺ, and we gave him our oath of allegiance and performed prayer behind him. He glanced out of the corner of his eye at a man who was not settling his spine when he bowed and prostrated. When the Prophet ﷺ finished the prayer, he said: ‘O Muslims, there is no prayer for the one who does not settle his spine when bowing and prostrating.’”  

ابن ماجة:٨٧١ – حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا مُلاَزِمُ بْنُ عَمْرٍو عَنْ عَبْدِ اللَّهِ بْنِ بَدْرٍ أَخْبَرَنِي عَبْدُ الرَّحْمَنِ بْنُ عَلِيِّ بْنِ شَيْبَانَ عَنْ أَبِيهِ عَلِيِّ بْنِ شَيْبَانَ وَكَانَ مِنَ الْوَفْدِ قَالَ

خَرَجْنَا حَتَّى قَدِمْنَا عَلَى رَسُولِ اللَّهِ ﷺ فَبَايَعْنَاهُ وَصَلَّيْنَا خَلْفَهُ فَلَمَحَ بِمُؤْخِرِ عَيْنِهِ رَجُلاً لاَ يُقِيمُ صَلاَتَهُ يَعْنِي صُلْبَهُ فِي الرُّكُوعِ وَالسُّجُودِ فَلَمَّا قَضَى النَّبِيُّ ﷺ الصَّلاَةَ قَالَ يَا مَعْشَرَ الْمُسْلِمِينَ لاَ صَلاَةَ لِمَنْ لاَ يُقِيمُ صُلْبَهُ فِي الرُّكُوعِ وَالسُّجُودِ  

suyuti:481-1b –
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السيوطي:٤٨١-١b –

" خَرَجْنَا حَتَّى قَدِمْنَا عَلَى رَسُولِ الله ﷺ فَبَايَعْنَاهُ وَصَلَّيْنَا مَعَهُ، فَلَمَحَ بِمُؤَخِّرِ عَيْنِهِ رَجُلًا لَا يُقِيمُ صُلْبَهُ في الرُّكُوعِ وَالسُّجُودِ، فلَمَّا قَضَى النَّبِىُّ ﷺ الصَّلَاةَ قَالَ يَا مَعْشَرَ الْمُسْلِمِين لَا صَلَاةَ لامْرِئٍ لَا يُقِيمُ صُلْبَهُ في الرُّكُوعِ وَالسُّجُودِ".  

[ش] ابن أبى شيبة